Date: Sat, 6 Jan 2001 09:40:04 -0800 (PST) From: Jake Burkholder <jake@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/i386/i386 exception.s genassym.c globals.s machdep.c support.s swtch.s src/sys/i386/include asmacros.h globaldata.h globals.h src/sys/i386/isa icu_vector.s Message-ID: <200101061740.f06He4J18857@freefall.freebsd.org>
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jake 2001/01/06 09:40:04 PST
Modified files:
sys/i386/i386 exception.s genassym.c globals.s
machdep.c support.s swtch.s
sys/i386/include asmacros.h globaldata.h globals.h
sys/i386/isa icu_vector.s
Log:
Use %fs to access per-cpu variables in uni-processor kernels the same
as multi-processor kernels. The old way made it difficult for kernel
modules to be portable between uni-processor and multi-processor
kernels. It is no longer necessary to jump through hoops.
- always load %fs with the private segment on entry to the kernel
- change the type of the self referntial pointer from struct privatespace
to struct globaldata
- make the globaldata symbol have value 0 in all cases, so the symbols
in globals.s are always offsets, not aliases for fields in globaldata
- define the globaldata space used for uniprocessor kernels in C, rather
than assembler
- change the assmebly language accessors to use %fs, add a macro
PCPU_ADDR(member, reg), which loads the register reg with the address
of the per-cpu variable member
Revision Changes Path
1.75 +6 -12 src/sys/i386/i386/exception.s
1.97 +2 -4 src/sys/i386/i386/genassym.c
1.17 +2 -12 src/sys/i386/i386/globals.s
1.426 +11 -4 src/sys/i386/i386/machdep.c
1.77 +1 -3 src/sys/i386/i386/support.s
1.104 +2 -7 src/sys/i386/i386/swtch.s
1.20 +4 -4 src/sys/i386/include/asmacros.h
1.16 +2 -4 src/sys/i386/include/globaldata.h
1.14 +3 -6 src/sys/i386/include/globals.h
1.25 +3 -1 src/sys/i386/isa/icu_vector.s
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